Treatment of dairy wastewater by commercial activated carbon and bagasse fly ash: Parametric, kinetic and equilibrium modelling, disposal studies

被引：109

作者：

Kushwaha, Jai Prakash ^{[1
]}

Srivastava, Vimal Chandra ^{[1
]}

Mall, Indra Deo ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Roorkee 247667, Uttarakhand, India

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 10期

关键词：

Dairy wastewater; Adsorption; Activated carbon; Bagasse fly ash; Disposal; TOXIC METAL-IONS; AQUEOUS-SOLUTION; REVERSE-OSMOSIS; ADSORPTION; SORPTION; REMOVAL; ISOTHERM; REUSE; DYES;

D O I：

10.1016/j.biortech.2010.01.002

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Present study reports treatment of synthetic dairy wastewater (SDW) in terms of chemical oxygen demand (COD) removal by means of adsorption onto activated carbon-commercial grade (ACC) and bagasse fly ash (BFA). Optimum conditions for SDW treatment were found to be: initial pH approximate to 4.8. adsorbent dose of 20 g/I for ACC and 10 g/I for BFA and contact time;approximate to 8 h. Pseudo-second-order kinetic model was found to fit the kinetic data and Redlich-Peterson isotherm model was generally found to best represent the equilibrium data for SDW treatment by ACC and BFA. The change in entropy and enthalpy for SDW adsorption onto ACC and BFA were estimated as 125.85 kJ/mol K and 91.53 kJ/mol; and 25.71 kJ/mol K and 17.26 kJ/mol, respectively. The negative values of change in Gibbs free energy indicate the feasibility and spontaneous nature of the adsorptive treatment. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3474 / 3483

页数：10

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